This is a complete guide to the firmware. The DG8245V is a high-end GPON/XPON Optical Network Terminal (ONT) often used by ISPs (Internet Service Providers) like Vodafone, Claro, Oi, and others, typically for fiber broadband plans (500Mbps, 1Gbps, etc.).
To manually update your firmware, follow these steps via the web interface: huawei dg8245v firmware